Alyssa Columbus » R-Ladies complete list Go back to directory. Add to Address Book. Alyssa Columbus Graduate Student Johns Hopkins University City Irvine CA United Stateshome Website: Personal Website Biographical Info R-Groups: R-Ladies Irvine co-organizer and founder Interests: open source, data science, machine learning, data visualization, programming in R Contact Method: LinkedIn Categories: Speaker, United States Updated 1 year ago.